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Totally confused, (oh wait...) anyhow, we build jeeps with 37" to 42" tires and run stock masters and boosters.
Even suggesting that a 33" tire is "big" is funny

Stopping power is proportional to the caliper, to the tire diameter, to the pedal ratio, and last and least is the bore of the master or diameter of the booster.

SD


I agree with you. The comment by Moses Ludel that another poster quoted was referring to stock Jeeps - when offroad, putting in a big braking system when operating on loose surface might lead to easy lock-up.

However, with larger tires, the increased rolling resistance, lowered leverage, and increased rotational weight can really benefit from an improved braking system.

Rather than go with rear discs or increased efficiency calipers when I went to 35" tires, I elected to go with improved brake fluid pressure application. I converted my CJ7 from manual brakes to power brakes by using a VANCO unit, which uses a Chevy pickup dual diaphram vacuum booster coupled with a 1968-1972 Corvette master cylinder, along with their custom push rods and mounting brackets. Has worked great. If I want to, I can lock the brakes at 45 mph on pavement. I have a bad foot, and the abiity to get good braking with significantly reduced pedal effort is a plus for me.

1977 CJ-7, fiberglass body, AMC 360 w/ headers, DUI ignition, Edelbrock intake and Holley 4150 carb, TF999, Dana 300, 4.56 gears lockers, York air comp, 4" susp lift, 2" body lift, BFG 35" M-T tires, Megashifter, AGR pump & box, REP8000 winch.